Sash balance and lock.



PATENTED JULY 28, 1908.

AIS. BRADLEY. SASH BALANCE AND LOOK.

APPLICATION FILED NOV.18, 1907.

ALFRED S. BRADLEY, OF ARKANSAS CITY, KANSAS.

SASH BALANCE AND LOCK.

Specification of Letters Patent.

Patented July 28, 1908.

App1ication filed. November 18, 1907. Serial No. 402,703.

T 0 all whom it may concern:

Be it known that I, ALFRED S. BRADLEY, citizen of the United States, residing at Arkansas City, in the county of Cowley and State of Kansas, have invented certain new and useful Improvements in Sash Balances and Locks, of which the following is a specification.

This invention comprehends certain new and useful improvements in sash balances and locks, and the invention has for its object a simple device of this character designed to take the place of the ordinary sash weights and cords that are so liable to get out of order and that require continual attention for repairs or replacement.

I/Vith this and other objects in view as will more fully appear as the description proceeds Y the invention consists 1n certain constructions and arrangements of the parts that I shall hereinafter fully describe and claim.

For a full understanding of the invention, reference is to be had to the following description and accompanying drawings, in which:

v Figure 1 is a rear elevation of a window provided with the improvements of my invention; Fig. 2 is a fragmentary horizontal sectional view through the casing and sash; Fig. 3 is a fragmentary vertical section; and Fig. 4 is a detail fragmentary view illustrating a modified form of gearing.

Corresponding and like parts are referred to in the following description and indicated in all the views of the drawings by the same reference characters.

My improved sash balance and lock device comprises racks 1 that are secured to opposite sides of a window sash by screws or any desired fastening devices, said racks being designed for meshing engagement with toothed drums 2 spring pressed in a direction to compensate for the weight of the window sash. These drums 2 are journaled in casings 3 secured in any desired manner within the window frame, as clearly illustrated in the drawing. Each drum 2 is provided with a preferably spring detent or pawl 4 secured at one end within the casing 3 and formed with a lug at its free end designed to enter between the teeth on the periphery of the drum. In order to hold the drums stationary, so as to effectively lock the window sash at any desired elevation, cams 5 are pivotally mounted in bosses 6 formed on the respective casings 3,-said cams being designed for engagement with the detents 4 when turned in one direction by the handle 7, so as to prevent the retraction of the detent from the drum, and thereby hold the latter stationary in an evident manner.

From the foregoing description in connec tion with the accompanying drawing, it will be seen that I have provided a very simple, durable and efficient construction of sash bal ance and lock device that will take the place of the cumbersome and troublesome sash cords and Weights and that may be cheaply manufactured and readily assembled and ap plied to the window sash and frame respec tively.

As illustrated in Fig. 4, it is obvious that I may provide an additional gear wheel, such as that designated 8, interposed between the rack and the toothed periphery of the drum and meshing with both, so as to secure a compensating movement with a long sash.

Having thus described the invention, what is claimed as new is:

In a device of the character described, the combination with a window sash and its frame, of a vertically disposed rack secured to the side of the window sash, a casing secured to the frame contiguous to the rack, a spring rotated drum mounted in said casing and formed on its periphery with teeth meshing with the teeth of the rack, a detent mounted within the casing and formed with a lug designed to enter between the teeth of the drum, and a cam ournaled in the casing and adapted to press against the free end of the detent to hold its lug between the teeth of the drum, said cam being formed with a handle projecting out of the casing.

In testimony whereof I affur my signature in presence of two witnesses.

ALFRED S. BRADLEY. [L. s.] IVitnesses: 1

C. A. BUsH, J. C. TOPLIFF. 

